Consider a single crystal of some hypothetical metal that has the bcc crystal structure and is oriented such that a tensile stress is applied along a [121] direction. if slip occurs on a (101) plane and in a direction, compute the stress at which the crystal yields if its critical resolved shear stress is 3.0 mpa.

Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]